Circular-knitting machine



(Remodel.) 3 sheets-sheet 1.

W. H. MAYO.

CIRCULAR KNITYTING MAGHINE.

Patented May 24, A1887..

(No Model.) 3 Sheets-Sheet 2.

W. H. MAYO.

. CIRCULAR KNITTING MACHINE. No. 363,528. A Patented May 24, 1887.

Hm H1., "In WE.

(No Model.) 3 Sheets-Sheet 3. W. H. MAYO.

GIRGULAR-KNITTING MACHINE.

No. 363,528. Patented May 24, 188?.

W Wen/1n iUNrTED STATES PATENT Erica lVILLlAM IIO\VIES MAYO, OF LYNN, MASSACHUSETTS, SSIGNOR OF ONE' HALF TO GEORGE D. MAYO, OF SAME PLACE, AND NATI'IANIEL E..MAYO,

OF' RllVI'lllll, MASSACHUSETTS.

CIRCULAR-KNITTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 363,528, dated May 24, 1887.

Application filed January P, 1596. Serial Xn. 197,055. (No model.)

duce tubular fabric, as in thc formation of the` leg cf a sarl: or stocking, and straight fabric, as in the formation ofa he'cl or toe; and it rc lates more partienlarl y to improvements'upon those machines invented by me and patented n mier the respective numbers226,09l, 274,208, :nui IiiLOOO, to which reference may be had.

In this machine, as in machines ofa similar class, a rotary motion is given tothe cylinder, and the full set or complement of needles may -he employed in the formation of the leg of a sock, stocking, or other tubular fabric; but in the formation of the hector toe aj reciproca-- tory motion isgiven, and only a portion of the needles-prct'erably about onc half-are at sneh time employed, the needles not then bcinf: moved to knit being raised ont of the way nl' the knitting-cant ln theV formation ot theheel or toe it is necessary to raise one needle at a time from the series employed, whichis done at each reciprocation ofthe eanreylindcr until only sufficient needles are left in operation to produce the narrowcst course, after which the needles so raised are again lowered, one at a time, into line with the knitting'cams to resume knitting and widen the fabric, and the pouch foraheel or toe having been made, all the needles elevated preparatory to commencing the heel or toe are lowered together into line with the knitting-cams and circular knitting is again resumed.

In the machines described in the patent-s above referred to, the needles have had to be raised and lowered by hand,which is not only a tedious operation, requiring the constant watchl'nlness of the operator, but is also a creat source of injury to the hooks ofthe ncedles.

My invention has for its object to antomat- 5o ieally elevate those needles which are not to be employed in knittingT a heel or toe,- and to thereafter elevate, one at a time, the needles which are to be used toknitin the formation of the heel or loe, and then, at the proper 55 time, to automatically depress not only the needles used for heel and loc work, butalso those needles which were elevated and throwiront ot' action when the heel or toe was commenced.

To this end my invention consists, essen- 6o tially, in a canreylinder, its needle-elevating and stitch cams, combined with a guide-plate placed above the stitch cam, and with needleelevating latches adapted to slide in ways made at the ends ofthe saitl`gi1ide-plate; in the com- 65 bination,with the camcylindcr, of needle-lifting and needle depressing: latches, locking devices to keep the said latches, when desired, in such positionV as not to act upon the .'.heels ofthe needles, and mechanism, to be described, 7o to release the said locking devices and allow theneedle-lifting,r and needle-deprcssinglatches to come into position to etl'ectually elevate and depress the needles at the pippcr times; also,

.in the combination, with the canrcylinder, of l75 a ncedle-liftin, ,1r guide by which those needles not moved to knit during the operation of the machine to form the heel or toc are successively raised just before the commencement of theheel ertoe, and a needle-lowering guide to So lower the needles after the colnplet-ion thereof.

My invention also embraces a peculiar construction of knitting-cam to be described, by which I am enabled to indiscriminately actuate the long and short heeled needles which 85 I use in my present invent-ion, as in the Patents Nos. 274,208 and 319,000, above referred to, in the formation of plain and fancy stitches.

Other improvements will be described, and point-ed out in the claims at the end of this 9o specification.

Figure 1, in front elevation, represents the iiecdlecylinder, its needles, the cain-cylint'lcr, bed-plate, and yarn-guides of a knitting-machine embodying'my invention, the bed-plate g5 being partially broken out to show the lower beveled toothed edge of the cani-cylinder and a portion ofthe bcvetgear which imparts mo tion thereto, the samebeingmounted upon and receiving its motion from the usual driv.-`

is a sectional detail of Fig. 2n through the shoulder B12 and the finger F2. Fig. 3 is a plan view of Fig. 1. Fig. 4 is a transverse section of the canreylinder, showingthe needle-elevating cani in position to engage the heels of `and elevate those needles ynot used during the formation of the heel or toe. Fig. 5 is a detail view to be referred to, showing the parts instrumental in operating one of the needle-lifting and needle-depressing latches. Fig. 6 is a detail inner side view ol a portion of theeam-cylinder, showing one of the needle-lifting latches in its depressed position ready to act upon and rasethe needles and one of the needle-depressing latches in its ele- Y vated position ready to act upon and draw the needles previously elevated down again during the formation of the heel or toe of a sock or stocking. Fig. 7 is a section ot' Fig. 2 on the diagonal line a; .'v, looking toward the right, showing the knitting-cams, to be described, as in position to actuate only the long- .35 heeled needles. Fig. 8 is a detail to be referred to. Figs. 9, 10, 11, and 12 are-detail views of portionsxot` the cam-cylindcr, showing the needle-elevating and needle-depressing guides and the means to operate the same. 4o Fig.v13 is a detail view of the needlelifting and needle-depressing latches and their guideplates detached from the camcylinder. Fig. 14 is a detail view of one of the 'stitchcams renier/ed from the cam-cylinder. Fig. 15 is a detail view of the long and short heeled needles, to be referred to.

The. needle-cylinder P, the means for adjusting it vertieally,'the needles, the cam-cylihder N, provided with vertically-movable wedge-shaped stitch-cams C G', annular ledge E', extending nearly around the wholeinner face of the cam-cylinder, the skeleton cylinder` O, having the lingers to guide the heels of the needles,`and the guide-plate G are the same as and are represented by like letters in my Patent No. 319,000, above referred to. The lower end of the cam-cylinder N is provided with teeth at P2", which are engaged by the bevel-toothed gear P22 on the shaft P2, the rotation of which in one or the other direction turns the cam-cylinder, all as usual.

The wedge-shaped stitchcams C C are attached by the screws c c to-blocks c, adapted to slide vertically in suitable slots, one of which slots and block therein is shown at the left of Fig. 1 b y partially breaking away the carriage el", to which the said cam is attached,

` short to be actuated by it, being the said screws c c' projecting beyond the said carriage coat the outer side of the cam-cylin der suiciently to be acted upon by the cams d d', attached to a segmental plate, D, adapted to move within an annular groove formed in a ring, D', which encircles the outside of the cam-cylinder and is attached to the bed-plate hy suitable screws, D", the said ringD serv ing to bear on the ledge D"z (see Fig. 4) of the i cam cylinder to keep itin place.

Within the space left by the division of the annular ledge E', and riveted to thc cam-cylinder, is a ^-shaped plate, F, which constitutes the needle elevating cam, it being made ot such size as to leave a channelff, between it and the movable stitch-cams C C for the passage of the heels of' the needles. This plate I is made about onehalf the thickness ot' the annular ledge E and ot thc stitch-cams CC', the difference being. approximately, the difference between the length of the heels of the long-heeled needles a and the heels of the short-heeled needles af. (Shown in Fig. 15.)

The plate F is provided at one edge (see the right of Fig. 2) with a rib or flange, p, which projects outward as far as the face ot' the aunular ledge E', and at the opposite inclined edge of the plate F the cam-cylinder is provided with aslot,y, for the receptionfofa slidepiece, p',`somewhat similar in shape. to thc flangegathe upper edge of the said slide-piece p"iutcrloeking with the upper edge ot' the flange p. This sllde-piece p has a shoulder provided withl an elongated threaded shank, p2, (see Fig. 7,) which is extended through the diagonal slot y inthe cam-cylinder N, the

said threaded shank receiving upon it, at the r .outside ofthe cam-cylinder, a nut, B, and being surrounded by a spiral spring, s, inclosed within a hub, B', fastened to the canrcylinder. The spiral spring s bears against the back ot' the slide piece b and the flange at the inner end of the hub B and forces thesaid slidepiece p forward, so as to normally remainin los line with the face of the rib or flange p, so that -the .long and short heeled needles a1z,when so desired, may be actuated to take yarn from the yarn-guide W. (Shown in Figs. 1 and ,3.)

In Figs. 3l and 7 of the drawings I have shown the hiibB' as provided with a recess, r, and the nut B with a short pin, o", adapted to fit the said recess. The pin serves to prevent the rotation of the nut, and also to keep the slide-piece p drawn back in line with the face of the ^shaped plate F when it is desired that only the long-heeled needles should take yarn and knit, the nut B in such event heilig drawn out to remove the pin r' from its recess r in the hub, when it may be turned to the right or left, causing the pin 1" to rest upon the end of the sleeve, as shown clearly in Fig. 7. When the slide-piece p is thus withdrawn, only those needles with the long heels are actuated to knit. As'they-come in contact with the cam F, the short-heeled needles,'being too brought into contact with Athe under side of the rib or flange 363,528 Y i s p, and being forced beneath it, cause the hooks of such needles to pass below and without taking yarn from the yarn-guide.

The ends of the guide-plate G' are shown in Figs. 2 and 13 as provided with recesses g to receive within them the needle-lifting latches ZZ', formed with notched ends at m m', and having pins o o', which latter project through slots o"e o2 (see Figs. 1, 2, and 5) in the camcylinder N. The pins o o are provided with recesses at their outer ends toreeeive the loose ends of springs 10 11, the other ends of the said springs being fastened to the eani-cyli nder by the screws 12 13.

Guide-plates G G2, one at each end of the guide-plate G', are fastened to the cam-cylinder by the screws 14 14, a sufficient space being left between them and the inclined ends of the guide-plate G' to form channels for the passage upward of the heels of the needles when caught by the notched end of a needle-lifting latch when narrowing the fabric in the formation of a heel or toc. These guide-plates Gr2 G2 have their outer ends recessed at g2 g2, (see Fig. 13,) to receive the needle-depressing latches Z" Z", which are in shape similar to the needlelifting latches ZZ', except that their upperends are notched to engage with theheels of and lower those needles previously raised to narrow the fabric. The latches ZZ Z2, being also provided with pins or projections o3 o4, which project th rough diagonal slots s s in the camcylinder N, and being recessed to receive springs 18, fastened to the cam-cylinder, the free ends of the said springs entering the said recesses, serve to force the needle-depressin" latches up to their highest required point when released by the locking devices, to be described, where they will remain in position to engage willi the heels ofthe needles elevated by the needle-lifting latches when narrowing the fabric, the said latches Z2 Z acting to lower the needles into line with the knitting-cams when the elevated needles are toE be lowered to widen the fabric or to do circular knitting.

The needle-lifting latches Z Z are kept elevated and the needle-depressing latches Z112 depressed during the rotary motion ofthe camcylinder for the production of tubular fabric by locking devices herein shown as arms A A' and A" A, pivoted to the outside of the cam-cylinder at Y Y, Figs. 1, 3, and 5, and provided at their lower edges with suitable shoulders, against which the pins or projections o o'and o o* ot' their respective latches will rest when in their elevated or depressed position. The arms A A and A2 A3 are kept in proper relation with their co-operating pins bythe aid of springs c o, held in place on the cam-cylinder by the said screws Y yY, the free ends of the said springs engaging with the upper ends of the arms or locking devices in convenient or desired manner, theyV being herein shown as entering holes in pins carried by the saidarms. It is therefore evident that when the needle-lifting latches are in their elevated position and theneedle-depressing .the screws 26X.

latchesin their depressed position, their pins will be caught by the locking devices and locked until released, as will be described, when the springs 10, 1l, and 18 will operate to bring the latches into position to act upon the heels of the needles to elevate or to depress them, as the case may be. l

Each of the arms or locking devices is provided with an outwardly-projecting pin marked 1, 2, 3, 4, arranged one above the other, which, when desired, are acted upon by tripping or releasing devices, shown as arms or inclined ways w w' 102 w3, formed upon the end of plates 15, held in place upon nprig-hts e or standards S S' S2 S by the screws 19, which pass through them and are secured in the said uprights or standards. The said plates are further provided with catches 20, adapted to engage with upright spring-engaging handles H H ll' H', fastened in the said uprights or standards by the screws k h h' h', the said spring-engaging handles serving to 'keep the plates 15 held back in the position shown in the drawings, Figs. 1 and 3, so as to keep the cams or ways n' 1U' w w out of the line of the pins ofthe locking devices, in which position the machine is rotated for circular knitting.

Fastened to the head or other convenient part of each of the screws 19 is a spiral spring, 21, which surrounds the saine and is fastened to each of the plates 15. These springs act to bring the plates, when released by the springengaging handles H H H' H', into such position that their attached inclines or cams w 'w' 'w2 w3 may act to trip the locking devices and disengage the pins of the needle-lifting or necdledepressi n g latches, according as to whether the fabric is being narrowed or widened.

Y The cam-cylinder N is provided with two inclined slots, 22 23, (secFigs. 9, 10, 11, and 12,) at opposite sides thereof. The slot 22, which extends slightly below the upper edge ot' the annular ledge E', receives within it a needleelevating guide, 2t, while the slot 23 at the opposite side, which is somewhat shorter than the slot 22, receives within it a needle-depressing guide, 25. These guides 2t and 25 are held back flush with the inner face of the cameyliuder N, as in Figs. 1, 3, 9, and 1l, when the machine is being irotated for the productionV of tubularfabric, and during the formation of a heel or toe, by the aid ot' the springs 2G 27, each having one of its ends fastened to the guides themselves, the other end of each spring being fastened tothecam cylinder by Assuming that the leg or foot of a sock or stocking is to be knitted, all the needles being then used, the cam-cylinder will be rotated in the direction-of the arrow 100, Fig. 3; but' the segmental plate D, by reason of its friction on the ring D' outside the cam-cylinder, will remain at rest until ,the stud c', then :it the lower end ofthe eaind', has ascended to the highest point of the said cam,l lifting with itA its attached stitehcam C', and at the same time the oppositexstud, c, which at the start IOS IIO

narrow the fabric, the -needle elevating guide 21 is pressed in by the finger 2S, operated by hand, causing the inner face of the said guide to project within the cam-cylinder N, as shown in Figs. 4.and of the drawings, so as, dury ing the rotationofthe cam cylinder, to engage 'ing devices A A.

with the needles having only the long heels n, preferably about one-half, and lift them suceessively into line with the upper edge of the guide-plates G' and. G, thus throwing them out of operative position, where they are left, after which the elevating-guide is released by raising thesaid linger 28 by hand, the spring 26 then acting to withdraw the guide. The tension.

of the stitches upon the shanks of `the needles thus raised will be sudicient to keep them ele- 'vated until positively depressed bythe needlethe springs 19 acting to bring the cam-shaped or inclined ends w w' into the position shown in dotted lines, Fig. 3, and in full lines, Fig. 5, the pins or studs 30 on the uprights or standards S S'serving to stop the travel of the plates l5, so as. to bring their attached cam-shaped or inclined ends w w' always into line with and ready to act upon the pins 1 and 2 of the lock- The camcylinder is then turned for about olie-half a revolution to bring it into position directly opposite that shown in the drawings, and the pin l of the locking device A, by this movement of the cam-cylinder, rides over the inclined way or cam w, re-

leasing its contact with the pin o of the needlelifting latch l', Iwhich latch is immediately pressed down by the spring 10, with il s notched end m in line with the annular ledge E', as

shown in Fig. 6. The cam cylinder is then 1o tated in a direction opposite that of the arrow 100, bringing the notched, end of the needle-lifting latch l in contact with the heel of the iirst or outermost needle of those em` ployed to knit in narrowing or forminga heel or toe, and the needle engaging the said latch causes the latter to risc in the recess g of the guide-plate G until the heel of the needle comes in contact with the inclined end g' of the said plate, when the heel of the needle is by the said inclined end g thrown ont of the notch o f the said latch, and thereafter travels up the said inclined end to a position above the plate G; or,in other words, th e upward movement of the said latch effects the lodgment of the* heel of the needle upon the inclined end g of the guideplate G', after which the needle so acted upon by the said inclined cam-cylinder.

end g will be lifted until the heel has passed the spring 31 and rests upon the top of the said guide-plate G', the needle-lifting latch.

being then prevented, by its locking device' [engaging the pin o', 'from falling unti-l the cam `or incline w, in the motion of the cam-cylinder -forward in the direction of the arrow, is again reached, which cam then acts to lraise the locking device and release the needle-lil`ting latch. In the described reverse movement of lthe cani-cylinder-z'. e., in the direction opposite to that indicated by the arrow-the pin 2 of the locking device A rides over the camv or incline w', thereby releasing the pin o of the needle-,lifting latch l and allowing it to drop into line with the annular ledge E', so that its notched end may be brought into engagement with the heel of the first or outermost needle of those employed at 'the opposite side,

elevating it in a similar manner to that above described.

The springs 31 serve to close the channels formed between the guide-plates GHG2 G2 and to prevent the heels of the needles from being caught therein during the reciprocation of the Thus one needle at a time is raised from each side of those employed in narrowing the fabric until those needles directly in the center, and indicated by the nnmeralsSin Fig. 3, have been reached, which forni the shortest course in the heel or toe, when the plates 15, previously broughtinto position to have their cams or inclines w w' cooperate with and trip the locking devices A A', will be again brought back into the position shown in full lilies in Figs. land 3,where they are held by the spring-engaging handles H H, as described. The needles having thus been elevated one at-a time to narrow the fabric, the springengaging handles H H' are operated to release the plates 15, which,by their sp rings 19,are caused to turn,bringin g their attached cams or inclines w2 zo into line to act upon t-he pins 3 and 4 of the locking devices A2 A3. The cam-cylinder being still recipr0- cated and moving in a direction opposite that of the arrow 100, Fig.3, the pin 3 is brought in contact with. the cam or incline w, over which it rides, raising its locking device or- XID most or last one of those needles previously raised to narrow the fabric, causing it to be lowered simultancousl y with tl1esaidneedlcde pressing latch until it has forced the said needle-depressing latch completely into its recess, the downward movement of the said latch lodging the heel of the needle so engaged by it upon the inclined end g of the guide-plate G, down which it travelsnntil itis broughtint-o line with the annular ledge E', where it is in turn acted upon and lifted by the cam F to receive yarn from the guide XV. The pin 4 of the locking device or arm A3, in the next movement of the cam-cylinder in the direction of the said arrow, rides over the cam or incline wwhich releases the pin o* and permits ils attached latch l?, through the agency of the spring 1S, tov rise in time to engage with the heel of the innermost or last one ot those needles at the opposite side of those elevated in narrowing, bri iiging it into line with the annular ledec E' in a similar manner to that just describe( Both the needle-depressing latches Z'z are preventing from rising after being depressed or acted upon by the heels of the needles at each alternate reciprocation of the cam-cylinder by the said locking devices A2 A, which engage with the pins o o,whe1e they are held until released by the cams or inclines w 103, as 'above described. Thus one needle at a time is lowered from those needles elevated in narrowing the fabric until they have all been successivcly brought into line with the ledge E', after which they are acted upon by the knitting-cams to widen the fabric to form thepouch for the heel or toe. The finger 29 is then operated by hand to force the needle-depressing guide into' its most inward position, as shown in Fig. l2, in which position the heels ofthe ueedlcs,raised previous to the commencement of the heel or toe, are brought by the rotation of the cameylinder into contact with the under edge of the said needle-depressing guide, which will have the effect to successively lower the needles into line with the knitting-cam. The finger 29 is then raised, and the spring 27 will withdraw the said ncedlc-depressing guide, when circular knitting may be again resumed.

At each reverse motion of the cam-cylinder it is evident the segmental slide D and its attached cams d zZ will act to reverse the position of the stitch-cams C C through their attached studs c c', so as to form a proper channel for the guidance ofthe heels of the needles, all as usual.

l have shown air intermediate yarn-guide composed of a cross''piece, B1, fastened by the screw b to the upper yend of a vertical red, It, screwed into the bed-plate, the saidcross-piece having an arm, B", projecting atright angles therefrom, and also provided with the usual guide-eyes, b,through which the yarn is passed after leaving the bobhins. (Not shown.) The arm B is shown as provided with a forked end a collar, R, made'adjuslable on the rod It by' the thumb-screw r', thc upward or downward movement of the said collar giving a greater or less tension to the yarn, through the lever F', in being fed to the needles.

I n the reciprocation of the cam-cylinder,a11d

j ust at the commencement ofeach reverse movenient thereof, any slack in the yarn is taken up by the take-up leverF', which immediately rises and draws upon the yarn, at the same time raising the linger F2, which grips the yarn between it and the shoulder B, and, acting as a. clamp, prevent-s any more yarn from being drawn from the bobbi ns until the surplus yarn which may be occasioned by anyslack, has been taken up by the needles, in wlliclrevent the take-up lever F will be drawn .down by the yarn until the finger Fz slightly falls, which will allow more yarn to be drawn from the bobbins.

Should any of the needles employed in narrowingandwidening or those unemployed needles which were raised out of the way by any possible chance drop down partially from their elevated position and come in contact with the needleelevating or needle-depressing latches l Z and I l", it isobvious the said latches will form resilient contact-points for the heels of the needles, as well as guides to direct them into their proper course, the play of the plus o o and o3 o* in the slots o2 oz and s s' and their point of contact with the arms or locking delvices A A and A2 A3 being sufficient t-o permit the needle-elevating and needle-depressing latches to slide back when struck by the heels of the needles so dropping.

1. The eain-cylinder, its needle-elevating cam F, and stitching-cams C C', combined with a guide-plate, G', placed above them, and the sliding needle-elevating latches l Z at the opposite ends of the said guide-plate, and arranged to voperate substantially as and for the purpose described. l

2. The cam-cylinder, its' attached annular ledge, and the needle-elevating and stitch. cams, combined with guide-plates G G and with the needle-depressing latches Z" Z2, arranged to slide in the said guidcplates, to opcrate substantially as and for the purposes dcscribed.l

f 3. The cam-cylinder and its attached guideplates G^and Gl' G", the said guide-plates being provided with recesses, combined with the sliding needle elevating latches Z l and the sliding needlcdcpressing latches Z" l'f, the said latches being provided with notched ends to engage the heels ot' and elevate or depress the needles when required, substantiall y in thc manner and for the purposes described.

4. The needle cylinder and its needles, and the cam-cylinder provided with inclined slots and attached guide-plate, andthe notched necdlc-lifting latches provided with outwardly' projecting pins entering the said inclined slots of the cam-cylinder, combined with locking devices to co-operate with and engage the pins of the needle-lifting latches, and means, as dcscribed, to move the cam-cylinder, substantially as set forth.

5. The needlc-cylinder and its needles, and the cam-cylinder provided with inclined slots and attached guide plates, andthe notched needle-depressing lat-ches provided with outwardlyprojeeting pins entering the said slots its of the cam A- cylinder, combined with locking devices to co-operate with and engage the pins ing or needle-depressing latches to fall or rise,

' B, engaging the said shank and provided with a and means to move the cani-cylinder, substantially as and for the purposes described. 7. The needle-cylinder, its needles, the camcylinder, its attached ledge E', guide-plates G" and G2 G2, and the needle-lifting latches Z Z and needle-depressing latches Z Z2 and their cooperating devices, substantially as described, adapted to engage with 'the heels of and elevate or depress the needles when desired, and the stitch-cams C C and needle-elevating cam F, provided at one inclined edge with a flange, p, combined with a slide-piece, p, atits opposite inclined edge, the said slide-piece being movable within a correspondin gl y-shaped slot in the cam-cylindei',substantially as described.

' 8. The cam-cylinder slotted at yand provided with stitch-cams and a needle-elevating cam having atene of itsinclined edges an outward- ]y-projecting rib' or angeand at its other ed-ge a slide-piece Working' within the said slot y and having an elongated threaded shank, and anut,

pin, combined with a spiral spring surrounding theshank of the said slide-piece and with a hub or sleeve fastened to the cam-cylinder and inclosing the said spring, the said hub or sleeve having a recess to cooperate with the pin of the said nut, as described, and for the purposes set forth. I

9. The -cam cylinder N, having pivoted thereto the arms A" A and A2 A5, provided with locking shoulders and pins 1 2 and 3 4. combined with the springs o fv, needle-lifting and needle-depressing latches Z Z' and l1 P and their attached recessed pins o o and o3 0*, and the springs 1,0, 11, and ,18, substantially in the manner and for the purposes described.

10.. The needle-cylinder and its needles and the cam-cylinder provided with inclined slots 22 and 23 and with 'lingers 28 and 29, combi ned with a needle-elevating guide, 24, adapted to enter the'slot 22, and a needle-depressing guide, 25, adapted to enter the slot 23, andthe' springs 26 and 27, substantially as and for the purposes descrbed. Y

11. The needle-cylinders, the needles therein, the cani cylinder, needle elevating and de-V pressing latches, the locking devices A A', pivoted ,thereon and provided with projecting pins, and the plates 15, provided at one end with cams or inclines w wwiu and with catches 20, uprights or standards S S Sz S3, and screws 19, by which to pivot the said plates to the said standards, and locling devices A A",com

bined with the spiral springs2l and the springengaging handles H H and H' H', substantially in the manner and for the purposes described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM Howes MAYO.' Witnesses:

G. W. GREGORY, F. CUTTER. 

